The mean value theorem for functions of two variables

由 Tortal, Grace R., Esmane, Annabelle R.
出版 1983

Wonder healers of the Philippines: Interviews with a herbalist, a spiritist and a faith healer

由 Lahoz, Esperanza, Tortal, Grace R., Cuadra, Christopher, Pasis, Gerard
出版 1980

Victorio Edades: Father of modern art in the Philippines (painting)

由 Mayo, Maria Gianina, Cuadra, Christopher, Lahoz, Esperanza, Reyes, Anthony, Tortal, Grace R., Pacis, Gerard
出版 1980